JPH0465233A - Thin stone composite material - Google Patents

Abstract

PURPOSE:To develop the properties, especially, design properties caused by a weight feeling possessed by a stone material to a degree same to or more than those of a natural stone by providing a specific range of a protruding surface to the surface of a stone. CONSTITUTION:A thin stone material to be utilized is composed of a natural precious stone, for example, marble or granite, various ceramics or an artificial stone and pref. has thickness of 1-7mm. A support material is composed of a board or panel of every kind composed of inorg. or org. matter having strength withstanding the force holding the thin stone material to a protruding surface and a honeycomb sandwich panel is especially pref. because strength is excellent even when the thin stone material is held to the protruding surface. The degree of the protruding surface is pref. set so that a curved surface coefficient sigma is 0.10-1mm/m and a thin stone composite material having this protruding surface has effect developing a wt. feeling. In the bonding and fixing of the thin stone material, various org. adhesives, for example, an epoxy adhesive, an unsaturated polyester adhesive, a polyester adhesive, a polyurethane adhesive or a synthetic rubber adhesive or various inorg. adhesives can be utilized.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a composite material useful as interior and exterior materials for buildings, interior panels and partition panels for ships, aircraft, and vehicles, and decorative materials for furniture. The present invention relates to materials, and more specifically to thin stone composite materials with convex surfaces.

(Prior Art) Stone has been used as a building material due to its natural properties and functions. In particular, the design quality due to its weight is extremely high compared to wood, other natural materials, and artificial materials. However, stone has drawbacks such as being brittle and heavy, and is difficult to process into thin materials. In addition, it has been difficult to use as a building material for large areas due to the practical disadvantage that it is heavy and difficult to construct when used for large areas with normal thickness.

In recent years, the construction of commercial buildings, hotels, and especially high-rise buildings has been active, but there is also a strong desire for luxury, and there has been a desire for technological improvements that can effectively utilize stone as interior materials.

As a conventional technique, a technique for obtaining a thin layer of stone has been developed, as shown in Japanese Patent Application Laid-open No. 56-8217, etc., and a composite technique using thin stone has been developed in British Patent No. 1.215.5 old publication, etc. material has been proposed. Therefore, it is thought that by utilizing these technologies, the disadvantages of stone being brittle and heavy can be overcome.

(Problem to be Solved by the Invention) By the way, the design quality due to the heavy feeling of stone is impaired in the above-mentioned thin stone composite material due to surface undulations due to the large area after construction. In other words, the above-mentioned thin stone composite material did not provide a clue to solving the problem of creating a thin stone composite material with a design comparable to that of natural stone.

The purpose of the present invention is to provide a thin material that not only has the advantages of being lightweight and has excellent workability, but also exhibits the properties and functions of stone, especially the design properties due to its weight, which are equal to or better than natural stone. Our goal is to provide stone composite materials.

(Means for Solving the Problem) Against this background, the present inventor conducted extensive research on how to make thin stone composite materials exhibit a sense of weight after construction, and found that
It was discovered that by giving the stone surface a convex surface within a certain range, a sense of weight could be created. That is, the convex surface in a specific range has the effect of making that part stand out and making the thickness more appealing to the human eye. It has also been found that joints, corners, etc., enhance the sense of weight of the stone and are appealing to the eye. Quantitatively, a convex surface thin stone composite material with a degree of convexity having a curvature coefficient σ of 0.05 to 2 mm/m, preferably 0.10 to 1 mm/m, appeals to people with its weight and solidity. In terms of effectiveness, it is equivalent to or better than natural stone.

If the convexity coefficient σ is less than 0.05 mm/m or if it is a concave thin stone composite material, it will only feel flat and thin.
The weight of the stone is not fully demonstrated, and if the surface is concave, it gives the impression of being lumpy, which greatly reduces the sense of luxury and weight. On the other hand, in the case of a thin stone composite material with a convexity coefficient σ exceeding 2 mm/m, the convexity is clearly noticeable, giving an impression of discomfort and impairing the aesthetic appearance.

The thin stone material used in the present invention is a thin plate material with a thickness of 0.5 to 10 mm, preferably 1 to 7 mm, made of natural stones such as marble, granite, various ceramics, artificial stones, etc. It is inclusive.

Supporting materials utilized in the present invention include various inorganic and organic boards and panels that have the strength to hold thin stone on a convex surface, preferably lightweight and rigid panels, metal honeycomb core sandwich panels, lightweight mineral The material includes plate-like materials such as solid wood boards and light organic material boards. In particular, honeycomb sandwich panels are suitable as supporting materials because of their strong strength even when they are made into convex surfaces. The thickness used is 3 to 100 mm.

In order to form a thin stone composite material, it is necessary to bond and solidify the thin stone material and the supporting material over the entire opposing bonding surfaces. For this adhesive solidification, various organic adhesives such as epoxy adhesives, unsaturated polyester adhesives, polyester adhesives, polyurethane adhesives, synthetic rubber adhesives, or various inorganic adhesives can be used.

In order to develop a convex surface, the thin stone material and the supporting material are fixed with a jig or a suitable straightening device, and the two are bonded and solidified so that the stone surface becomes a convex surface.

Alternatively, by selecting a supporting material that has a different coefficient of linear expansion for thin stone and placing it in a heating or cooling environment while bonding the two, the stone surface will become a convex surface and the bond will solidify in that state. . Another method is to finish the stone surface of a thin stone composite material that has been bonded and solidified into a convex surface. The above is an example of how to make the stone surface of the thin stone composite material itself convex. Another method is to make the stone surface convex by making the edges different. However, it is difficult to create a convex surface using only natural stone.

The convexity coefficient σ of the thin stone composite material 1 of FIG. 1 according to the present invention, which has a curved and convex surface, is equal to It is obtained by dividing the maximum height δ (mm) from the plane by the length L (m) of the composite plate 1. That is, (Examples) Examples of the present invention will be shown below.

next, A comparative example is shown.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a thin stone composite material with a curved and convex surface according to the present invention, and FIG. 2 is a drawing showing a method for measuring the convexity coefficient. 1... Thin stone composite material, 2... Convex surface. Patent applicant: Asahi Kasei Industries, Ltd.

Claims (1)

[Claims] (1) A thin stone composite material consisting of a thin stone material and a supporting material, characterized in that the surface of the thin stone material is a convex surface.